WDS400T4B0E vs ZA4000NM1A002
SSD head-to-head - specs, value and live price side by side.
Verdict
For a NAS cache or write-heavy pool, the ZA4000NM1A002 is the safer pick - the WDS400T4B0E uses QLC NAND, which wears out faster and slows badly under sustained writes (light, read-mostly use only).
Value at a glance
Endurance (TBW)
WDS400T4B0E
1,200 TB
ZA4000NM1A002
5,600 TB
Price history
UK · cheapest per day
WDS400T4B0E £400
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| WDS400T4B0E | ZA4000NM1A002 | |
|---|---|---|
| Capacity | 4 TB | 4 TB |
| Form factor | M.2 | 2.5 |
| Interface | NVMe | SATA |
| NAND type | QLC | TLC |
| Endurance (TBW) | 1,200 TB | 5,600 TB |
| DWPD | - | 0.7 |
| DRAM cache | No | Yes |
| Power-loss protection | No | No |
| Sustained write | - | - |
| Cost / TBW | $0.389 | - |
| Price / TB | $116.74 | - |
| Buy |
£400
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Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB uses the cheapest live price. Buy links are Amazon affiliate.
WDS400T4B0E
No Backblaze failure data for this model.
ZA4000NM1A002
No Backblaze failure data for this model.